IOI

IOI is one of the blobs that play a major role in the beginning of After the End.

At the start of Chapter 7, it is revealed to be Wamuu.

Appearance
IOI is a blue blob with a brown core. It is described as the largest of the blobs, with an inside that resembles the wind. When it sleeps, this wind resembles a gentle breeze.

When it meets Kazu, it changes its appearance into a muscular humanoid with a single horn, while still keeping its blue skin.

In its last appereance, it looks like a golden-glowing man. This other form has a square as a tattoo, just under the bridge of the nose. it wears large earrings and a white arabian-looking turban. apart from metal boots, a loincloth and a tank top with knives stabbed through, it doesen't wear anything else.

Personality
IOI seems to be simple-minded and gentle. It was the first one to actually attack the trio of kids, but it took the longest about of time to devour its meal.

For some reason, it seems to be nice to Kazu, defending him from Blackpink and even sacrificing itself for him.

In Chapter 7 it shows a forgiving nature and a deep respect for Kazu, going as far as calling him "Lord" before disappearing.

Story
As of now, not much is known about IOI's backstory, but it is known that at some point it ended up in Electric School Avenue's basement together with EXO, Blackpink, and the capsules that contained Joss and Kyrianos.

In Chapter 1, it made its debut by absorbing Antonio and throwing Eliza to EXO, that quickly devoured it. It also made a cameo appearance in Chapter 3, where it was sleeping.

It makes its final appearance in Chapter 6, when Kazu is thrown downstairs by a group of bullies. It moves towards Kazu, but doesn't kill him. Instead, it stays close to him and transforms into a humanoid form. However, Blackpink notices it and the two of them argue (although the subject of the argument is unclear, Kazu assumes it has to do with eating him). Blackpink and AKB48 prepare to battle, but IOI throws itself in the line of fire, crystallizing and shattering at Kazu's touch.

In Chapter 7, Kazu sees the ghost of IOI, which tells him not to blame himself for its death. However, Kazu is determined to avenge him, believing he owes it to the spirit.

Trivia

 * Due to its large size and insides said to resemble the wind, IOI could have some ties to Wamuu. This is also proven by the fact that Tegan found a video file that showed a man uncannily similar to the Pillarman, and how it turns into a humanoid form resembling him when it meets Kazu.
 * The connection was confirmed in chapter 7, when Wamuu's ghost speaks to Kazu about its death.
 * IOI smells of sweat.